Will T3 decrease muscle mass if taken with AS?

I have three more weeks of Fina and next week I will add Winny and T3.
My question is, will I loose any muscle mass from T3 if I take it with the above cycle and keep my cal. intake high? Can one still grow at the same rate on AS if they are combined with T3? (I'm planning to go at this dosages of T3 (per day), 25mcg, next week 50 mcg, then 50 or 75, then 25 and then 12.5 for total of 5 weeks.

Not at 50-75,mcg a day you shouldn't. Low doses of t3 on a cycle are actually really good imo b/c it increases protein synthesis just like the gear you are on does. I prefer to keep it at 25mcg/d and taken 5 random days a week to help bulk and keep fat off while on a cycle. I know some ppl do this for over 8 weeks at a time but I don't recommend going that long. I have however done 6 weeks of this and had very very good results

Originally posted by kizer_soce Not at 50-75,mcg a day you shouldn't. Low doses of t3 on a cycle are actually really good imo b/c it increases protein synthesis just like the gear you are on does. I prefer to keep it at 25mcg/d and taken 5 random days a week to help bulk and keep fat off while on a cycle. I know some ppl do this for over 8 weeks at a time but I don't recommend going that long. I have however done 6 weeks of this and had very very good results

On the days that you take T3, do you increase your calories?
I guess what I mean is that T3 will burn more calories... could that cause slower gains, since not enough calories are available for bulking?

I was eating a minimum of 4500cals a day and as much as 7k cals at 25mcg I don't think I hindered my gains at all being that I put on 31 lbs in 6 weeks. I always take in more cals on training days but other than that there was no difference when I added t3.